<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container{
            width: 700px;
            height: 700px;
            background-color: #666;
        }

        div{
            width: 300px;
            height: 300px;
            float: left;
        }
        .box1{
            background-color: red;
        }
        .box2{
            background-color: blue;
        }
        .box3{
            background-color: green;
        }
        ul li{
            float: left;
            margin: 0 40px;
        }

    </style>
</head>
<body>
    <div class="container">
        <div class="box1"></div>
        <div class="box2"></div>
        <div class="box3"></div>
    </div>
    
    <ul>
        <li>
            <a href="#">导航1</a>
        </li>
        <li>
            <a href="#">导航2</a>
        </li>
        <li>
            <a href="#">导航3</a>
        </li>
    </ul>
</body>
</html>